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feat(app): load landblock from dats and upload mesh to GPU

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GameWindow now owns a DatCollection + TerrainRenderer. On load it
opens the dat directory passed as argv[0] (or ACDREAM_DAT_DIR), finds
Holtburg (landblock 0xA9B4FFFF) by default with a fallback to the
first landblock in the cell b-tree, builds the CPU mesh from
LandblockMesh.Build, and uploads VBO+EBO+VAO with a 3f/3f/2f attribute
layout. No draw call yet — shader and matrix uniforms land in Task 9.

Enabled AllowUnsafeBlocks on the App csproj so the fixed-buffer upload
in TerrainRenderer compiles. Uses dats.Get<LandBlock>(id) instead of
TryGet(..., out T) to sidestep the [MaybeNullWhen(false)] analysis that
TreatWarningsAsErrors was flagging.

Smoke verified against the real retail dats: prints
"loaded landblock 0xA9B4FFFF" and the window stays alive with no GL
errors or exceptions.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Erik 2026-04-10 16:42:13 +02:00
parent 6d18e0bd38
commit 8356fe65a0
4 changed files with 113 additions and 1 deletions
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12
src/AcDream.App/Program.cs
View file

@ -1,5 +1,15 @@
using AcDream.App.Rendering;
var window = new GameWindow();
var datDir = args.FirstOrDefault()
?? Environment.GetEnvironmentVariable("ACDREAM_DAT_DIR");
if (string.IsNullOrWhiteSpace(datDir))
{
Console.Error.WriteLine("usage: AcDream.App <dat-directory>");
Console.Error.WriteLine(" or: set ACDREAM_DAT_DIR and run with no args");
return 2;
}
using var window = new GameWindow(datDir);
window.Run();
return 0;